Conus bengalensis sumbawaensis: Shell relatively large, varying from 8 to 10 cm for adults. Fairly constant in shape, solid cylindrical to narrowly conical, the spire elevated, of moderate height and stepped, of 9 to 10 glossy to smooth whorls; outline nearly straight, sharply pointed, larval shell of about 2/4 to 3 whorls and of a pinkish violet colour. Four to six postnuclear whorls weakly tuberculate and marked with brown spots or lines. The last whorl is covered with very weak and fine spiral grooves at the base, obsolete towards the shoulder, which is sub-angulate to angulate. The aperture becomes wider towards the basal part of the columella; the inner aperture is white.
Ground colour brownish, spire and last whorl sculptured with distinct lines crossing each other like a network of small to very large blotches or white tent marks, through it the spotted pattern of the ground colour renders an ornamentation of irregular spots, which, as it were, gives the impression of brownish banding. The white spots that overlap the brown background strongly resembles these of Cylinder textile neovicarius (da Motta, 1982).

Conus bengalensis sumbawaensis: The newly described subspecies is similar to C. bengalensis (Okutani, 1968), C. gloriamaris (Chemnitz, 1777) andL. eduardi (Delsaerdt, 1997).

* C. bengalensis differs from the newly described subspecies C. bengalensis sumbawaensis by its length: the nominal species reaches 13 cm or more in adult state, and is distinguished by a slenderer last whorl, less angulate shoulder, its more convex outline below shoulder and by its finer pattern of smaller whitish tents. Between this colouration the ground colour forms broad brownish spiral bands. Live taken specimens are very dark chocolate brown.
C. bengalensis is a species occurring in the Andaman Sea, Bay of Bengal, SE India were it lives between the 10 and 15 m of depth.
* C. gloriamaris differs from C. b. sumbawaensis by its much broader shoulder, by the broader spire and by the tent mark coloration which is much finer and yellowish or bluish.
* L. eduardi is very rare, relatively close to this newly described C. b. sumbawaensis, but is distinguished by its spire and by the overall colour, which is orangish brown, spirally arranged in three bands on the last whorl. L. eduardi is only known from the northern part of the Red Sea.

Conus bengalensis sumbawaensis: All specimens were live-collected by local fishermen and divers at a depth of about 20 to 25 metres in the waters of Teluk Saleh, Sumbawa Island, which is part of the Lesser Sunda Islands in the southeastern part of the Indonesian archipelago, between